[BUG]Error in compiling with GCC11

I tried comping raft on branch-22.02 with GCC11, but it ended in fail I think the following patch is needed to make it build-able.

In cub_wrappers.cuh, it is necessary to set the initial value to worksize.
In sort.cu, for pointers, if you release them with "delete", you should allocate them with "new".

`

*** raft/cpp/include/raft/common/cub_wrappers.cuh-dist  2022-01-14 15:37:43.356426295 +0900
--- raft/cpp/include/raft/common/cub_wrappers.cuh       2022-01-14 15:41:27.639861604 +0900
***************
*** 44,53 ****
  {
!   size_t worksize;
    cub::DeviceRadixSort::SortPairs(
      nullptr, worksize, inKeys, outKeys, inVals, outVals, len, 0, sizeof(KeyT) * 8, stream);
    workspace.resize(worksize, stream);
    cub::DeviceRadixSort::SortPairs(
      workspace.data(), worksize, inKeys, outKeys, inVals, outVals, len, 0, sizeof(KeyT) * 8, stream);
  }
  
  }  // namespace raft
--- 44,53 ----
  {
!   size_t worksize = 0;
    cub::DeviceRadixSort::SortPairs(
      nullptr, worksize, inKeys, outKeys, inVals, outVals, len, 0, sizeof(KeyT) * 8, stream);
    workspace.resize(worksize, stream);
    cub::DeviceRadixSort::SortPairs(
      workspace.data(), worksize, inKeys, outKeys, inVals, outVals, len, 0, sizeof(KeyT) * 8, stream);
  }
  
  }  // namespace raft
*** raft/cpp/test/sparse/sort.cu-dist   2022-01-15 19:37:06.839494720 +0900
--- raft/cpp/test/sparse/sort.cu        2022-01-15 19:39:49.878890059 +0900
***************
*** 60,68 ****
  
    r.uniform(in_vals.data(), params.nnz, float(-1.0), float(1.0), stream);
  
!   int* in_rows_h = (int*)malloc(params.nnz * sizeof(int));
!   int* in_cols_h = (int*)malloc(params.nnz * sizeof(int));
!   int* verify_h  = (int*)malloc(params.nnz * sizeof(int));
  
    for (int i = 0; i < params.nnz; i++) {
      in_rows_h[i] = params.nnz - i - 1;
--- 60,68 ----
  
    r.uniform(in_vals.data(), params.nnz, float(-1.0), float(1.0), stream);
  
!   int* in_rows_h = new int[params.nnz];
!   int* in_cols_h = new int[params.nnz];
!   int* verify_h  = new int[params.nnz];
  
    for (int i = 0; i < params.nnz; i++) {
      in_rows_h[i] = params.nnz - i - 1;

Start by reviewing the GCC 11 build failure described for branch-22.02, then inspect raft/cpp/include/raft/common/cub_wrappers.cuh and raft/cpp/test/sparse/sort.cu. Confirm the reported initialization and allocation changes resolve compilation, and verify the affected sparse sort test builds successfully.